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1.2 1.5 30

Reflection

Material: $n_1 \lt n_2$

Reflexion: $\alpha_1 = \alpha_2$
Fraction: $\frac{\sin(\alpha)}{\sin(\beta)}=\frac{n_2}{n_1}=\frac{c_1}{c_2}=\frac{\lambda_1}{\lambda_2}$
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